lowland fir vs lowland white fir

lowland fir and lowland white fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
lowland fir	Yes	No	No	No
lowland white fir	Yes	No	No	No

As nouns, lowland fir and lowland white fir are synonyms defined as:

lowland fir and lowland white fir: lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves

Other synonyms of lowland fir include Abies grandis, giant fir, grand fir.

lowland fir (noun)	lowland white fir (noun)
lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves	lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves